TROOP-F2 Spacecraft

Experiments in differential GPS and attitude control while providing risk reduction on-orbit testing for a variety of payloads.

A Train Rapid on Orbit Payload (TROOP) mission, named TROOP-F2, is a 6U CubeSat, expected to launch in August on Transporter 11. TROOP-F2 will simultaneously conduct experiments in differential GPS and attitude control while providing risk reduction on-orbit testing for a variety of payloads. This flight will also provide the maiden flight for some exciting new NSL sub-systems.

The goal of the TROOP-F2 mission was for the satellite to act as docking target for VIGORIDE RPO Demo Mission 1 (“Vigoride”), which will approach it to 10 meters but not touch it. After the target experiment is completed, it will continue to operate, testing radios and sensors.

TROOP-F2 contains the following systems:

• Navigation and Attitude Subsystem: Attitude determination is made using a GridEye infrared horizon sensor. A GPS receiver is also included. From the GPS inputs, the CDH determines position and velocity, and orbit parameters are derived. Transmitted to Earth, these will provide accurate orbital TLEs, which will support accurate ground station antenna pointing, as well as updating of the SpaceTrack database to allow CSPOC to catalog and maintain the location of the spacecraft.
• Command and Data Handling (CDH) Subsystem: The CDH function shares hardware with the EPS function. The hardware includes dual processors with onboard diagnostics supporting both the EPS and CDH functions. Commands from NSL mission operations, transmitted by the NSL ground station, are received through the receiver module.

Communications System:

1. Two EyeStar S4 transceiver modules manufactured by NSL, each using a patch antenna, and communicating with the Iridium constellation on the established Iridium channels. Two are provided, only one is used at any given time. A GridEye Horizon Sensor on the patch antenna, allows transmitting only when the antenna is pointing away from the earth.
2. 2) A transmitter in the 900 MHz band, to communicate location data to the Vigoride spacecraft. The transmitter uses a patch antenna.

All transmissions from the satellite can be suspended, with a command transmitted via the Iridium constellation from mission operations to the satellite.

• BRO-14
• BRO-15
• CAKRA-1
• Connecta IoT 1
• Connecta IoT 2
• Connecta IoT 3
• Connecta IoT 4
• CUAVA-2
• Deimos
• Flock-4be 1
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• Lopen
• Nightjar
• OreSat0.5
• Phi-Sat-2
• PICO-1B-1
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• QUBE
• Rock
• Sateliot_1
• Sateliot_2
• Sateliot_3
• Sateliot_4
• SATORO-T2
• Tomorrow-S1
• Tomorrow-S2
• TORO
• TROOP-F2
• UM5-EOSat
• UM5-Ribat
• Waratah Seed
• WREN
• Lemur-2 193
• Lemur-2 194
• Lemur-2 195
• Lemur-2 196
• Sedna 1
• SR-0 DemoSAT